Muramasa is the leader of a Pokémon Dojo. He taught his students skills that they would need to win a battle. It was mentioned that Muramasa was a skilled battler when he was young and had won many battles with his Scizor, Masamune.

However, one of his students, Shingo, believed that he could predict the outcome of any battle with the help of his laptop. Hoping Ash would prove him wrong, Muramasa had both Trainers battle. Using his Heracross, Ash was able to defeat Shingo's Scizor.

After thanking Ash for a great battle, Shingo decided to train harder underneath his teacher Muramasa.

Pokémon

Masamune (Japanese: マサムネMasamune) is Muramasa's Scizor. It first appeared stalking Team Rocket and Ash. Muramasa later explained that they were training. It was then seen with its owner showing Ash and his friends around his fighting dojo. It then appeared training outside. When Team Rocket stole Shingo's laptop it appeared just in time, before Shingo's Scizor takes over. It lastly appears with its owner watching Ash and Shingo battle.